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LaunchDarkly · Developer toolsApr 29, 2026, 20:19 UTC

Issue with Experiment Results in case of Flag Variation edits

MinorNot disclosedUpdated 21h ago
Apr 29, 20:19 UTCMay 1, 00:09 UTC
Duration
27h 50m
Impact
Minor
Root cause
Not disclosed
LaunchDarkly, 90 days
16 incidents
Affected
Experiment results processingExperiment results analysisExperimentation (core functionality) - Experiment results processingExperimentation (core functionality) - Experiment results analysis
Status page

Final update

We have validated a fix to resolve all remaining experiments with inaccurate sample ratio mismatches (SRMs) or empty experiment results. The vast majority of experiments and experimentation customers were not impacted.

Timeline

  1. Resolved · May 1, 00:09 UTC
    We have validated a fix to resolve all remaining experiments with inaccurate sample ratio mismatches (SRMs) or empty experiment results. The vast majority of experiments and experimentation customers were not impacted.
  2. Monitoring · Apr 30, 00:04 UTC
    We've released a fix to prevent this issue in new experiments and iterations. We're working to resolve this issue for experiment data recently processed.
  3. Identified · Apr 29, 20:49 UTC
    We've identified the issue and are implementing a fix for this behavior.
  4. Investigating · Apr 29, 20:19 UTC
    We are aware of an issue affecting some customers that may result in sample ratio mismatches (SRMs) or empty experiment results if flag variations are edited between experiment iterations.

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Full history

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